From cb9cadad578297ffd78fa8a33670bdf1ab669e7e Mon Sep 17 00:00:00 2001
From: Ed Warnicke <eaw@cisco.com>
Date: Tue, 8 Dec 2015 15:45:58 -0700
Subject: Initial commit of vpp code.

Change-Id: Ib246f1fbfce93274020ee93ce461e3d8bd8b9f17
Signed-off-by: Ed Warnicke <eaw@cisco.com>
---
 vlib-api/vlibmemory/api.h | 139 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 vlib-api/vlibmemory/api.h

(limited to 'vlib-api/vlibmemory/api.h')

diff --git a/vlib-api/vlibmemory/api.h b/vlib-api/vlibmemory/api.h
new file mode 100644
index 00000000..7f2f6fa6
--- /dev/null
+++ b/vlib-api/vlibmemory/api.h
@@ -0,0 +1,139 @@
+/*
+ *------------------------------------------------------------------
+ * api.h
+ * 
+ * Copyright (c) 2009 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#ifndef included_vlibmemory_api_h
+#define included_vlibmemory_api_h
+
+#include <vppinfra/error.h>
+#include <svm.h>
+#include <vlib/vlib.h>
+#include <vlibmemory/unix_shared_memory_queue.h>
+#include <vlib/unix/unix.h>
+#include <vlibapi/api.h>
+
+/* Allocated in shared memory */
+
+/*
+ * Ring-allocation scheme for client API messages 
+ * 
+ * Only one proc/thread has control of a given message buffer. 
+ * To free a buffer allocated from one of these rings, we clear 
+ * a field in the buffer (header), and leave. 
+ * 
+ * No locks, no hits, no errors...
+ */
+typedef struct ring_alloc_ {
+    unix_shared_memory_queue_t *rp;
+    u16 size;
+    u16 nitems;
+    u32 hits;
+    u32 misses;
+} ring_alloc_t;
+
+/*
+ * Initializers for the (shared-memory) rings
+ * _(size, n). Note: each msg has an 8 byte header.
+ * Might want to change that to an index sometime.
+ */
+#define foreach_vl_aring_size                   \
+_(64+8, 1024)                                   \
+_(256+8, 128)                                   \
+_(1024+8, 64)
+
+#define foreach_clnt_aring_size                 \
+_(1024+8, 1024)                                 \
+_(2048+8, 128)                                  \
+_(4096+8, 8)
+
+typedef struct vl_shmem_hdr_ {
+    int version;
+
+    /* getpid () for the VLIB client process */
+    volatile int vl_pid;
+
+    /* Client sends VLIB msgs here. */
+    unix_shared_memory_queue_t *vl_input_queue;
+
+    /* Vector of rings; one for each size. */
+
+    /* VLIB allocates buffers to send msgs to clients here. */
+    ring_alloc_t *vl_rings;
+
+    /* Clients allocate buffer to send msgs to VLIB here. */
+    ring_alloc_t *client_rings;
+
+    /* Number of detected application restarts */
+    u32 application_restarts;
+
+    /* Number of messages reclaimed during application restart */
+    u32 restart_reclaims;
+
+} vl_shmem_hdr_t;
+
+#define VL_SHM_VERSION 2
+
+#define VL_API_EPOCH_MASK 0xFF
+#define VL_API_EPOCH_SHIFT 8
+
+static inline u32 vl_msg_api_handle_get_epoch (u32 index)
+{
+    return (index & VL_API_EPOCH_MASK);
+}
+static inline u32 vl_msg_api_handle_get_index (u32 index)
+{
+    return (index >> VL_API_EPOCH_SHIFT);
+}
+
+static inline u32 vl_msg_api_handle_from_index_and_epoch (u32 index, u32 epoch)
+{
+    u32 handle;
+    ASSERT (index < 0x00FFFFFF);
+
+    handle = (index<<VL_API_EPOCH_SHIFT) | (epoch & VL_API_EPOCH_MASK);
+    return handle;
+}
+    
+
+
+void *vl_msg_api_alloc(int nbytes);
+void *vl_msg_api_alloc_as_if_client (int nbytes);
+void vl_msg_api_free(void *a);
+int vl_map_shmem (char *region_name, int is_vlib);
+void vl_register_mapped_shmem_region(svm_region_t *rp);
+void vl_unmap_shmem (void);
+void vl_msg_api_send_shmem (unix_shared_memory_queue_t *q, u8 *elem);
+void vl_msg_api_send_shmem_nolock (unix_shared_memory_queue_t *q, u8 *elem);
+void vl_msg_api_send (vl_api_registration_t *rp, u8 *elem);
+int vl_client_connect (char *name, int ctx_quota, int input_queue_size);
+void vl_client_disconnect (void);
+unix_shared_memory_queue_t *vl_api_client_index_to_input_queue (u32 index);
+vl_api_registration_t *vl_api_client_index_to_registration (u32 index);
+int vl_client_api_map (char *region_name);
+void vl_client_api_unmap (void);
+void vl_set_memory_region_name (char *name);
+void vl_set_memory_root_path (char *root_path);
+void vl_enable_disable_memory_api (vlib_main_t *vm, int yesno);
+void vl_client_disconnect_from_vlib (void);
+int vl_client_connect_to_vlib(char *svm_name, char *client_name, 
+                              int rx_queue_size);
+int vl_client_connect_to_vlib_no_rx_pthread (char *svm_name, char *client_name, 
+                                             int rx_queue_size);
+u16 vl_client_get_first_plugin_msg_id (char * plugin_name);
+
+#endif /* included_vlibmemory_api_h */
-- 
cgit 1.2.3-korg